/Engine/Source/Runtime/Engine/Public/MaterialShared.h
Backs up any FShaders in editor loaded materials to memory through serialization and clearsFShaderreferences.
static void BackupEditorLoadedMaterialShadersToMemory ( [TMap](API\Runtime\Core\Containers\TMap)< [FMaterialShaderMap](API\Runtime\Engine\FMaterialShaderMap) *, [TUniquePtr](API\Runtime\Core\Templates\TUniquePtr)< [TArray](API\Runtime\Core\Containers\TArray)< uint8 > > > & ShaderMapToSerializedShaderData )